<?php
//////////////////////////////////////////////////////////////
///  phpThumb() by James Heinrich <info@silisoftware.com>   //
//        available at http://phpthumb.sourceforge.net     ///
//////////////////////////////////////////////////////////////
///                                                         //
// phpthumb.functions.php - general support functions       //
//                                                         ///
//////////////////////////////////////////////////////////////

class phpthumb_functions {

    function user_function_exists($functionname) {
        if (function_exists('get_defined_functions')) {
            static $get_defined_functions = array();
            if (empty($get_defined_functions)) {
                $get_defined_functions = get_defined_functions();
            }
            return in_array(strtolower($functionname), $get_defined_functions['user']);
        }
        return function_exists($functionname);
    }


    function builtin_function_exists($functionname) {
        if (function_exists('get_defined_functions')) {
            static $get_defined_functions = array();
            if (empty($get_defined_functions)) {
                $get_defined_functions = get_defined_functions();
            }
            return in_array(strtolower($functionname), $get_defined_functions['internal']);
        }
        return function_exists($functionname);
    }


    function version_compare_replacement_sub($version1, $version2, $operator='') {
        // If you specify the third optional operator argument, you can test for a particular relationship.
        // The possible operators are: <, lt, <=, le, >, gt, >=, ge, ==, =, eq, !=, <>, ne respectively.
        // Using this argument, the function will return 1 if the relationship is the one specified by the operator, 0 otherwise.

        // If a part contains special version strings these are handled in the following order: dev < (alpha = a) < (beta = b) < RC < pl
        static $versiontype_lookup = array();
        if (empty($versiontype_lookup)) {
            $versiontype_lookup['dev']   = 10001;
            $versiontype_lookup['a']     = 10002;
            $versiontype_lookup['alpha'] = 10002;
            $versiontype_lookup['b']     = 10003;
            $versiontype_lookup['beta']  = 10003;
            $versiontype_lookup['RC']    = 10004;
            $versiontype_lookup['pl']    = 10005;
        }
        if (isset($versiontype_lookup[$version1])) {
            $version1 = $versiontype_lookup[$version1];
        }
        if (isset($versiontype_lookup[$version2])) {
            $version2 = $versiontype_lookup[$version2];
        }

        switch ($operator) {
            case '<':
            case 'lt':
                return intval($version1 < $version2);
                break;
            case '<=':
            case 'le':
                return intval($version1 <= $version2);
                break;
            case '>':
            case 'gt':
                return intval($version1 > $version2);
                break;
            case '>=':
            case 'ge':
                return intval($version1 >= $version2);
                break;
            case '==':
            case '=':
            case 'eq':
                return intval($version1 == $version2);
                break;
            case '!=':
            case '<>':
            case 'ne':
                return intval($version1 != $version2);
                break;
        }
        if ($version1 == $version2) {
            return 0;
        } elseif ($version1 < $version2) {
            return -1;
        }
        return 1;
    }


    function version_compare_replacement($version1, $version2, $operator='') {
        if (function_exists('version_compare')) {
            // built into PHP v4.1.0+
            return version_compare($version1, $version2, $operator);
        }

        // The function first replaces _, - and + with a dot . in the version strings
        $version1 = strtr($version1, '_-+', '...');
        $version2 = strtr($version2, '_-+', '...');

        // and also inserts dots . before and after any non number so that for example '4.3.2RC1' becomes '4.3.2.RC.1'.
        // Then it splits the results like if you were using explode('.',$ver). Then it compares the parts starting from left to right.
        $version1 = eregi_replace('([0-9]+)([A-Z]+)([0-9]+)', '\\1.\\2.\\3', $version1);
        $version2 = eregi_replace('([0-9]+)([A-Z]+)([0-9]+)', '\\1.\\2.\\3', $version2);

        $parts1 = explode('.', $version1);
        $parts2 = explode('.', $version1);
        $parts_count = max(count($parts1), count($parts2));
        for ($i = 0; $i < $parts_count; $i++) {
            $comparison = phpthumb_functions::version_compare_replacement_sub($version1, $version2, $operator);
            if ($comparison != 0) {
                return $comparison;
            }
        }
        return 0;
    }


    function phpinfo_array() {
        static $phpinfo_array = array();
        if (empty($phpinfo_array)) {
            ob_start();
            phpinfo();
            $phpinfo = ob_get_contents();
            ob_end_clean();
            $phpinfo_array = explode("\n", $phpinfo);
        }
        return $phpinfo_array;
    }


    function exif_info() {
        static $exif_info = array();
        if (empty($exif_info)) {
            // based on code by johnschaefer at gmx dot de
            // from PHP help on gd_info()
            $exif_info = array(
                'EXIF Support'           => '',
                'EXIF Version'           => '',
                'Supported EXIF Version' => '',
                'Supported filetypes'    => ''
            );
            $phpinfo_array = phpthumb_functions::phpinfo_array();
            foreach ($phpinfo_array as $line) {
                $line = trim(strip_tags($line));
                foreach ($exif_info as $key => $value) {
                    if (strpos($line, $key) === 0) {
                        $newvalue = trim(str_replace($key, '', $line));
                        $exif_info[$key] = $newvalue;
                    }
                }
            }
        }
        return $exif_info;
    }


    function ImageTypeToMIMEtype($imagetype) {
        if (function_exists('image_type_to_mime_type') && ($imagetype >= 1) && ($imagetype <= 16)) {
            // PHP v4.3.0+
            return image_type_to_mime_type($imagetype);
        }
        static $image_type_to_mime_type = array(
            1  => 'image/gif',                     // IMAGETYPE_GIF
            2  => 'image/jpeg',                    // IMAGETYPE_JPEG
            3  => 'image/png',                     // IMAGETYPE_PNG
            4  => 'application/x-shockwave-flash', // IMAGETYPE_SWF
            5  => 'image/psd',                     // IMAGETYPE_PSD
            6  => 'image/bmp',                     // IMAGETYPE_BMP
            7  => 'image/tiff',                    // IMAGETYPE_TIFF_II (intel byte order)
            8  => 'image/tiff',                    // IMAGETYPE_TIFF_MM (motorola byte order)
            9  => 'application/octet-stream',      // IMAGETYPE_JPC
            10 => 'image/jp2',                     // IMAGETYPE_JP2
            11 => 'application/octet-stream',      // IMAGETYPE_JPX
            12 => 'application/octet-stream',      // IMAGETYPE_JB2
            13 => 'application/x-shockwave-flash', // IMAGETYPE_SWC
            14 => 'image/iff',                     // IMAGETYPE_IFF
            15 => 'image/vnd.wap.wbmp',            // IMAGETYPE_WBMP
            16 => 'image/xbm',                     // IMAGETYPE_XBM

            'gif'  => 'image/gif',                 // IMAGETYPE_GIF
            'jpg'  => 'image/jpeg',                // IMAGETYPE_JPEG
            'jpeg' => 'image/jpeg',                // IMAGETYPE_JPEG
            'png'  => 'image/png',                 // IMAGETYPE_PNG
            'bmp'  => 'image/bmp',                 // IMAGETYPE_BMP
            'ico'  => 'image/x-icon',
        );

        return (isset($image_type_to_mime_type[$imagetype]) ? $image_type_to_mime_type[$imagetype] : false);
    }


    function TranslateWHbyAngle($width, $height, $angle) {
        if (($angle % 180) == 0) {
            return array($width, $height);
        }
        $newwidth  = (abs(sin(deg2rad($angle))) * $height) + (abs(cos(deg2rad($angle))) * $width);
        $newheight = (abs(sin(deg2rad($angle))) * $width)  + (abs(cos(deg2rad($angle))) * $height);
        return array($newwidth, $newheight);
    }

    function HexCharDisplay($string) {
        $len = strlen($string);
        $output = '';
        for ($i = 0; $i < $len; $i++) {
            $output .= ' 0x'.str_pad(dechex(ord($string{$i})), 2, '0', STR_PAD_LEFT);
        }
        return $output;
    }


    function IsHexColor($HexColorString) {
        return eregi('^[0-9A-F]{6}$', $HexColorString);
    }


    function ImageColorAllocateAlphaSafe(&$gdimg_hexcolorallocate, $R, $G, $B, $alpha=false) {
        if (phpthumb_functions::version_compare_replacement(phpversion(), '4.3.2', '>=') && ($alpha !== false)) {
            return ImageColorAllocateAlpha($gdimg_hexcolorallocate, $R, $G, $B, intval($alpha));
        } else {
            return ImageColorAllocate($gdimg_hexcolorallocate, $R, $G, $B);
        }
    }

    function ImageHexColorAllocate(&$gdimg_hexcolorallocate, $HexColorString, $dieOnInvalid=false, $alpha=false) {
        if (!is_resource($gdimg_hexcolorallocate)) {
            die('$gdimg_hexcolorallocate is not a GD resource in ImageHexColorAllocate()');
        }
        if (phpthumb_functions::IsHexColor($HexColorString)) {
            $R = hexdec(substr($HexColorString, 0, 2));
            $G = hexdec(substr($HexColorString, 2, 2));
            $B = hexdec(substr($HexColorString, 4, 2));
            return phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg_hexcolorallocate, $R, $G, $B, $alpha);
        }
        if ($dieOnInvalid) {
            die('Invalid hex color string: "'.$HexColorString.'"');
        }
        return ImageColorAllocate($gdimg_hexcolorallocate, 0x00, 0x00, 0x00);
    }


    function HexColorXOR($hexcolor) {
        return strtoupper(str_pad(dechex(~hexdec($hexcolor) & 0xFFFFFF), 6, '0', STR_PAD_LEFT));
    }


    function GetPixelColor(&$img, $x, $y) {
        if (!is_resource($img)) {
            return false;
        }
        return @ImageColorsForIndex($img, @ImageColorAt($img, $x, $y));
    }


    function PixelColorDifferencePercent($currentPixel, $targetPixel) {
        $diff = 0;
        foreach ($targetPixel as $channel => $currentvalue) {
            $diff = max($diff, (max($currentPixel[$channel], $targetPixel[$channel]) - min($currentPixel[$channel], $targetPixel[$channel])) / 255);
        }
        return $diff * 100;
    }

    function GrayscaleValue($r, $g, $b) {
        return round(($r * 0.30) + ($g * 0.59) + ($b * 0.11));
    }


    function GrayscalePixel($OriginalPixel) {
        $gray = phpthumb_functions::GrayscaleValue($OriginalPixel['red'], $OriginalPixel['green'], $OriginalPixel['blue']);
        return array('red'=>$gray, 'green'=>$gray, 'blue'=>$gray);
    }


    function GrayscalePixelRGB($rgb) {
        $r = ($rgb >> 16) & 0xFF;
        $g = ($rgb >>  8) & 0xFF;
        $b =  $rgb        & 0xFF;
        return ($r * 0.299) + ($g * 0.587) + ($b * 0.114);
    }


    function ScaleToFitInBox($width, $height, $maxwidth=null, $maxheight=null, $allow_enlarge=true, $allow_reduce=true) {
        $maxwidth  = (is_null($maxwidth)  ? $width  : $maxwidth);
        $maxheight = (is_null($maxheight) ? $height : $maxheight);
        $scale_x = 1;
        $scale_y = 1;
        if (($width > $maxwidth) || ($width < $maxwidth)) {
            $scale_x = ($maxwidth / $width);
        }
        if (($height > $maxheight) || ($height < $maxheight)) {
            $scale_y = ($maxheight / $height);
        }
        $scale = min($scale_x, $scale_y);
        if (!$allow_enlarge) {
            $scale = min($scale, 1);
        }
        if (!$allow_reduce) {
            $scale = max($scale, 1);
        }
        return $scale;
    }

    function ImageCopyResampleBicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
        // ron at korving dot demon dot nl
        // http://www.php.net/imagecopyresampled

        $scaleX = ($src_w - 1) / $dst_w;
        $scaleY = ($src_h - 1) / $dst_h;

        $scaleX2 = $scaleX / 2.0;
        $scaleY2 = $scaleY / 2.0;

        $isTrueColor = ImageIsTrueColor($src_img);

        for ($y = $src_y; $y < $src_y + $dst_h; $y++) {
            $sY   = $y * $scaleY;
            $siY  = (int) $sY;
            $siY2 = (int) $sY + $scaleY2;

            for ($x = $src_x; $x < $src_x + $dst_w; $x++) {
                $sX   = $x * $scaleX;
                $siX  = (int) $sX;
                $siX2 = (int) $sX + $scaleX2;

                if ($isTrueColor) {

                    $c1 = ImageColorAt($src_img, $siX, $siY2);
                    $c2 = ImageColorAt($src_img, $siX, $siY);
                    $c3 = ImageColorAt($src_img, $siX2, $siY2);
                    $c4 = ImageColorAt($src_img, $siX2, $siY);

                    $r = (( $c1             +  $c2             +  $c3             +  $c4            ) >> 2) & 0xFF0000;
                    $g = ((($c1 & 0x00FF00) + ($c2 & 0x00FF00) + ($c3 & 0x00FF00) + ($c4 & 0x00FF00)) >> 2) & 0x00FF00;
                    $b = ((($c1 & 0x0000FF) + ($c2 & 0x0000FF) + ($c3 & 0x0000FF) + ($c4 & 0x0000FF)) >> 2);

                } else {

                    $c1 = ImageColorsForIndex($src_img, ImageColorAt($src_img, $siX, $siY2));
                    $c2 = ImageColorsForIndex($src_img, ImageColorAt($src_img, $siX, $siY));
                    $c3 = ImageColorsForIndex($src_img, ImageColorAt($src_img, $siX2, $siY2));
                    $c4 = ImageColorsForIndex($src_img, ImageColorAt($src_img, $siX2, $siY));

                    $r = ($c1['red']   + $c2['red']   + $c3['red']   + $c4['red'] )  << 14;
                    $g = ($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) <<  6;
                    $b = ($c1['blue']  + $c2['blue']  + $c3['blue']  + $c4['blue'] ) >>  2;

                }
                ImageSetPixel($dst_img, $dst_x + $x - $src_x, $dst_y + $y - $src_y, $r+$g+$b);
            }
        }
        return true;
    }


    function ImageCreateFunction($x_size, $y_size) {
        $ImageCreateFunction = 'ImageCreate';
        if (phpthumb_functions::gd_version() >= 2.0) {
            $ImageCreateFunction = 'ImageCreateTrueColor';
        }
        if (!function_exists($ImageCreateFunction)) {
            return phpthumb::ErrorImage($ImageCreateFunction.'() does not exist - no GD support?');
        }
        if (($x_size <= 0) || ($y_size <= 0)) {
            return phpthumb::ErrorImage('Invalid image dimensions: '.$ImageCreateFunction.'('.$x_size.', '.$y_size.')');
        }
        return $ImageCreateFunction(round($x_size), round($y_size));
    }


    function ImageCopyRespectAlpha(&$dst_im, &$src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $opacity_pct=100) {
        $opacipct = $opacity_pct / 100;
        for ($x = $src_x; $x < $src_w; $x++) {
            for ($y = $src_y; $y < $src_h; $y++) {
                $RealPixel    = phpthumb_functions::GetPixelColor($dst_im, $dst_x + $x, $dst_y + $y);
                $OverlayPixel = phpthumb_functions::GetPixelColor($src_im, $x, $y);
                $alphapct = $OverlayPixel['alpha'] / 127;
                $overlaypct = (1 - $alphapct) * $opacipct;

                $newcolor = phpthumb_functions::ImageColorAllocateAlphaSafe(
                    $dst_im,
                    round($RealPixel['red']   * (1 - $overlaypct)) + ($OverlayPixel['red']   * $overlaypct),
                    round($RealPixel['green'] * (1 - $overlaypct)) + ($OverlayPixel['green'] * $overlaypct),
                    round($RealPixel['blue']  * (1 - $overlaypct)) + ($OverlayPixel['blue']  * $overlaypct),
                    //$RealPixel['alpha']);
                    0);

                ImageSetPixel($dst_im, $dst_x + $x, $dst_y + $y, $newcolor);
            }
        }
        return true;
    }


    function ProportionalResize($old_width, $old_height, $new_width=false, $new_height=false) {
        $old_aspect_ratio = $old_width / $old_height;
        if (($new_width === false) && ($new_height === false)) {
            return false;
        } elseif ($new_width === false) {
            $new_width = $new_height * $old_aspect_ratio;
        } elseif ($new_height === false) {
            $new_height = $new_width / $old_aspect_ratio;
        }
        $new_aspect_ratio = $new_width / $new_height;
        if ($new_aspect_ratio == $old_aspect_ratio) {
            // great, done
        } elseif ($new_aspect_ratio < $old_aspect_ratio) {
            // limited by width
            $new_height = $new_width / $old_aspect_ratio;
        } elseif ($new_aspect_ratio > $old_aspect_ratio) {
            // limited by height
            $new_width = $new_height * $old_aspect_ratio;
        }
        return array(round($new_width), round($new_height));
    }


    function FunctionIsDisabled($function) {
        static $DisabledFunctions = null;
        if (is_null($DisabledFunctions)) {
            $disable_functions_local  = explode(',',     strtolower(@ini_get('disable_functions')));
            $disable_functions_global = explode(',', strtolower(@get_cfg_var('disable_functions')));
            foreach ($disable_functions_local as $key => $value) {
                $DisabledFunctions[trim($value)] = 'local';
            }
            foreach ($disable_functions_global as $key => $value) {
                $DisabledFunctions[trim($value)] = 'global';
            }
            if (@ini_get('safe_mode')) {
                $DisabledFunctions['shell_exec']     = 'local';
                $DisabledFunctions['set_time_limit'] = 'local';
            }
        }
        return isset($DisabledFunctions[strtolower($function)]);
    }


    function SafeExec($command) {
        static $AllowedExecFunctions = array();
        if (empty($AllowedExecFunctions)) {
            $AllowedExecFunctions = array('shell_exec'=>true, 'passthru'=>true, 'system'=>true, 'exec'=>true);
            foreach ($AllowedExecFunctions as $key => $value) {
                $AllowedExecFunctions[$key] = !phpthumb_functions::FunctionIsDisabled($key);
            }
        }
        $command .= ' 2>&1'; // force redirect stderr to stdout
        foreach ($AllowedExecFunctions as $execfunction => $is_allowed) {
            if (!$is_allowed) {
                continue;
            }
            $returnvalue = false;
            switch ($execfunction) {
                case 'passthru':
                case 'system':
                    ob_start();
                    $execfunction($command);
                    $returnvalue = ob_get_contents();
                    ob_end_clean();
                    break;

                case 'exec':
                    $output = array();
                    $lastline = $execfunction($command, $output);
                    $returnvalue = implode("\n", $output);
                    break;

                case 'shell_exec':
                    ob_start();
                    $returnvalue = $execfunction($command);
                    ob_end_clean();
                    break;
            }
            return $returnvalue;
        }
        return false;
    }


    function ApacheLookupURIarray($filename) {
        // apache_lookup_uri() only works when PHP is installed as an Apache module.
        if (php_sapi_name() == 'apache') {
            $keys = array('status', 'the_request', 'status_line', 'method', 'content_type', 'handler', 'uri', 'filename', 'path_info', 'args', 'boundary', 'no_cache', 'no_local_copy', 'allowed', 'send_bodyct', 'bytes_sent', 'byterange', 'clength', 'unparsed_uri', 'mtime', 'request_time');
            if ($apacheLookupURIobject = @apache_lookup_uri($filename)) {
                $apacheLookupURIarray = array();
                foreach ($keys as $key) {
                    $apacheLookupURIarray[$key] = @$apacheLookupURIobject->$key;
                }
                return $apacheLookupURIarray;
            }
        }
        return false;
    }


    function gd_is_bundled() {
        static $isbundled = null;
        if (is_null($isbundled)) {
            $gd_info = gd_info();
            $isbundled = (strpos($gd_info['GD Version'], 'bundled') !== false);
        }
        return $isbundled;
    }


    function gd_version($fullstring=false) {
        static $cache_gd_version = array();
        if (empty($cache_gd_version)) {
            $gd_info = gd_info();
            if (eregi('bundled \((.+)\)$', $gd_info['GD Version'], $matches)) {
                $cache_gd_version[1] = $gd_info['GD Version'];  // e.g. "bundled (2.0.15 compatible)"
                $cache_gd_version[0] = (float) $matches[1];     // e.g. "2.0" (not "bundled (2.0.15 compatible)")
            } else {
                $cache_gd_version[1] = $gd_info['GD Version'];                       // e.g. "1.6.2 or higher"
                $cache_gd_version[0] = (float) substr($gd_info['GD Version'], 0, 3); // e.g. "1.6" (not "1.6.2 or higher")
            }
        }
        return $cache_gd_version[intval($fullstring)];
    }


    function filesize_remote($remotefile, $timeout=10) {
        $size = false;
        $url = phpthumb_functions::ParseURLbetter($remotefile);
        if ($fp = @fsockopen($url['host'], ($url['port'] ? $url['port'] : 80), $errno, $errstr, $timeout)) {
            fwrite($fp, 'HEAD '.@$url['path'].@$url['query'].' HTTP/1.0'."\r\n".'Host: '.@$url['host']."\r\n\r\n");
            if (phpthumb_functions::version_compare_replacement(phpversion(), '4.3.0', '>=')) {
                stream_set_timeout($fp, $timeout);
            }
            while (!feof($fp)) {
                $headerline = fgets($fp, 4096);
                if (eregi('^Content-Length: (.*)', $headerline, $matches)) {
                    $size = intval($matches[1]);
                    break;
                }
            }
            fclose ($fp);
        }
        return $size;
    }


    function filedate_remote($remotefile, $timeout=10) {
        $date = false;
        $url = phpthumb_functions::ParseURLbetter($remotefile);
        if ($fp = @fsockopen($url['host'], ($url['port'] ? $url['port'] : 80), $errno, $errstr, $timeout)) {
            fwrite($fp, 'HEAD '.@$url['path'].@$url['query'].' HTTP/1.0'."\r\n".'Host: '.@$url['host']."\r\n\r\n");
            if (phpthumb_functions::version_compare_replacement(phpversion(), '4.3.0', '>=')) {
                stream_set_timeout($fp, $timeout);
            }
            while (!feof($fp)) {
                $headerline = fgets($fp, 4096);
                if (eregi('^Last-Modified: (.*)', $headerline, $matches)) {
                    $date = strtotime($matches[1]) - date('Z');
                    break;
                }
            }
            fclose ($fp);
        }
        return $date;
    }


    function md5_file_safe($filename) {
        // md5_file() doesn't exist in PHP < 4.2.0
        if (function_exists('md5_file')) {
            return md5_file($filename);
        }
        if ($fp = @fopen($filename, 'rb')) {
            $rawData = '';
            do {
                $buffer = fread($fp, 8192);
                $rawData .= $buffer;
            } while (strlen($buffer) > 0);
            fclose($fp);
            return md5($rawData);
        }
        return false;
    }


    function nonempty_min() {
        $arg_list = func_get_args();
        $acceptable = array();
        foreach ($arg_list as $arg) {
            if ($arg) {
                $acceptable[] = $arg;
            }
        }
        return min($acceptable);
    }


    function LittleEndian2String($number, $minbytes=1) {
        $intstring = '';
        while ($number > 0) {
            $intstring = $intstring.chr($number & 255);
            $number >>= 8;
        }
        return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
    }

    function OneOfThese() {
        // return the first useful (non-empty/non-zero/non-false) value from those passed
        $arg_list = func_get_args();
        foreach ($arg_list as $key => $value) {
            if ($value) {
                return $value;
            }
        }
        return false;
    }

    function CaseInsensitiveInArray($needle, $haystack) {
        $needle = strtolower($needle);
        foreach ($haystack as $key => $value) {
            if (is_array($value)) {
                // skip?
            } elseif ($needle == strtolower($value)) {
                return true;
            }
        }
        return false;
    }

    function URLreadFsock($host, $file, &$errstr, $successonly=true, $port=80, $timeout=10) {
        if (!function_exists('fsockopen') || phpthumb_functions::FunctionIsDisabled('fsockopen')) {
            $errstr = 'fsockopen() unavailable';
            return false;
        }
        if ($fp = @fsockopen($host, 80, $errno, $errstr, $timeout)) {
            $out  = 'GET '.$file.' HTTP/1.0'."\r\n";
            $out .= 'Host: '.$host."\r\n";
            $out .= 'Connection: Close'."\r\n\r\n";
            fwrite($fp, $out);

            $isHeader = true;
            $Data_header = '';
            $Data_body   = '';
            $header_newlocation = '';
            while (!feof($fp)) {
                $line = fgets($fp, 1024);
                if ($isHeader) {
                    $Data_header .= $line;
                } else {
                    $Data_body .= $line;
                }
                if (eregi('^HTTP/[\\.0-9]+ ([0-9]+) (.+)$', rtrim($line), $matches)) {
                    list($dummy, $errno, $errstr) = $matches;
                    $errno = intval($errno);
                } elseif (eregi('^Location: (.*)$', rtrim($line), $matches)) {
                    $header_newlocation = $matches[1];
                }
                if ($isHeader && ($line == "\r\n")) {
                    $isHeader = false;
                    if ($successonly) {
                        switch ($errno) {
                            case 200:
                                // great, continue
                                break;

                            default:
                                $errstr = $errno.' '.$errstr.($header_newlocation ? '; Location: '.$header_newlocation : '');
                                fclose($fp);
                                return false;
                                break;
                        }
                    }
                }
            }
            fclose($fp);
            return $Data_body;
        }
        return null;
    }

    function CleanUpURLencoding($url, $queryseperator='&') {
        if (!eregi('^http', $url)) {
            return $url;
        }
        $parse_url = phpthumb_functions::ParseURLbetter($url);
        $pathelements = explode('/', $parse_url['path']);
        $CleanPathElements = array();
        $TranslationMatrix = array(' '=>'%20');
        foreach ($pathelements as $key => $pathelement) {
            $CleanPathElements[] = strtr($pathelement, $TranslationMatrix);
        }
        foreach ($CleanPathElements as $key => $value) {
            if ($value === '') {
                unset($CleanPathElements[$key]);
            }
        }

        $queries = explode($queryseperator, @$parse_url['query']);
        $CleanQueries = array();
        foreach ($queries as $key => $query) {
            @list($param, $value) = explode('=', $query);
            $CleanQueries[] = strtr($param, $TranslationMatrix).($value ? '='.strtr($value, $TranslationMatrix) : '');
        }
        foreach ($CleanQueries as $key => $value) {
            if ($value === '') {
                unset($CleanQueries[$key]);
            }
        }

        $cleaned_url  = $parse_url['scheme'].'://';
        $cleaned_url .= (@$parse_url['username'] ? $parse_url['host'].(@$parse_url['password'] ? ':'.$parse_url['password'] : '').'@' : '');
        $cleaned_url .= $parse_url['host'];
        $cleaned_url .= '/'.implode('/', $CleanPathElements);
        $cleaned_url .= (@$CleanQueries ? '?'.implode($queryseperator, $CleanQueries) : '');
        return $cleaned_url;
    }

    function ParseURLbetter($url) {
        $parsedURL = @parse_url($url);
        if (!@$parsedURL['port']) {
            switch (strtolower(@$parsedURL['scheme'])) {
                case 'ftp':
                    $parsedURL['port'] = 21;
                    break;
                case 'https':
                    $parsedURL['port'] = 443;
                    break;
                case 'http':
                    $parsedURL['port'] = 80;
                    break;
            }
        }
        return $parsedURL;
    }

    function SafeURLread($url, &$error, $timeout=10, $followredirects=true) {
        $error = '';

        $parsed_url = phpthumb_functions::ParseURLbetter($url);
        $alreadyLookedAtURLs[trim($url)] = true;

        while (true) {
            $tryagain = false;
            $rawData = phpthumb_functions::URLreadFsock(@$parsed_url['host'], @$parsed_url['path'].'?'.@$parsed_url['query'], $errstr, true, (@$parsed_url['port'] ? @$parsed_url['port'] : 80), $timeout);
            if (eregi('302 [a-z ]+; Location\\: (http.*)', $errstr, $matches)) {
                $matches[1] = trim(@$matches[1]);
                if (!@$alreadyLookedAtURLs[$matches[1]]) {
                    // loop through and examine new URL
                    $error .= 'URL "'.$url.'" redirected to "'.$matches[1].'"';

                    $tryagain = true;
                    $alreadyLookedAtURLs[$matches[1]] = true;
                    $parsed_url = phpthumb_functions::ParseURLbetter($matches[1]);
                }
            }
            if (!$tryagain) {
                break;
            }
        }

        if ($rawData === false) {
            $error .= 'Error opening "'.$url.'":'."\n\n".$errstr;
            return false;
        } elseif ($rawData === null) {
            // fall through
            $error .= 'Error opening "'.$url.'":'."\n\n".$errstr;
        } else {
            return $rawData;
        }

        if (function_exists('curl_version') && !phpthumb_functions::FunctionIsDisabled('curl_exec')) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_HEADER, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
            curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
            $rawData = curl_exec($ch);
            curl_close($ch);
            if (strlen($rawData) > 0) {
                $error .= 'CURL succeeded ('.strlen($rawData).' bytes); ';
                return $rawData;
            }
            $error .= 'CURL available but returned no data; ';
        } else {
            $error .= 'CURL unavailable; ';
        }

        $BrokenURLfopenPHPversions = array('4.4.2');
        if (in_array(phpversion(), $BrokenURLfopenPHPversions)) {
            $error .= 'fopen(URL) broken in PHP v'.phpversion().'; ';
        } elseif (@ini_get('allow_url_fopen')) {
            $rawData = '';
            $error_fopen = '';
            ob_start();
            if ($fp = fopen($url, 'rb')) {
                do {
                    $buffer = fread($fp, 8192);
                    $rawData .= $buffer;
                } while (strlen($buffer) > 0);
                fclose($fp);
            } else {
                $error_fopen .= trim(strip_tags(ob_get_contents()));
            }
            ob_end_clean();
            $error .= $error_fopen;
            if (!$error_fopen) {
                $error .= '; "allow_url_fopen" succeeded ('.strlen($rawData).' bytes); ';
                return $rawData;
            }
            $error .= '; "allow_url_fopen" enabled but returned no data ('.$error_fopen.'); ';
        } else {
            $error .= '"allow_url_fopen" disabled; ';
        }

        return false;
    }

    function EnsureDirectoryExists($dirname) {
        $directory_elements = explode(DIRECTORY_SEPARATOR, $dirname);
        $startoffset = (!$directory_elements[0] ? 2 : 1);  // unix with leading "/" then start with 2nd element; Windows with leading "c:\" then start with 1st element
        $open_basedirs = split('[;:]', ini_get('open_basedir'));
        foreach ($open_basedirs as $key => $open_basedir) {
            if (ereg('^'.preg_quote($open_basedir), $dirname) && (strlen($dirname) > strlen($open_basedir))) {
                $startoffset = count(explode(DIRECTORY_SEPARATOR, $open_basedir));
                break;
            }
        }
        $i = $startoffset;
        $endoffset = count($directory_elements);
        for ($i = $startoffset; $i <= $endoffset; $i++) {
            $test_directory = implode(DIRECTORY_SEPARATOR, array_slice($directory_elements, 0, $i));
            if (!$test_directory) {
                continue;
            }
            if (!@is_dir($test_directory)) {
                if (@file_exists($test_directory)) {
                    // directory name already exists as a file
                    return false;
                }
                @mkdir($test_directory, 0755);
                @chmod($test_directory, 0755);
                if (!@is_dir($test_directory) || !@is_writeable($test_directory)) {
                    return false;
                }
            }
        }
        return true;
    }


    function GetAllFilesInSubfolders($dirname) {
        $AllFiles = array();
        $dirname = rtrim(realpath($dirname), '/\\');
        if ($dirhandle = @opendir($dirname)) {
            while (($file = readdir($dirhandle)) !== false) {
                $fullfilename = $dirname.DIRECTORY_SEPARATOR.$file;
                if (is_file($fullfilename)) {
                    $AllFiles[] = $fullfilename;
                } elseif (is_dir($fullfilename)) {
                    switch ($file) {
                        case '.':
                        case '..':
                            break;

                        default:
                            $AllFiles[] = $fullfilename;
                            $subfiles = phpthumb_functions::GetAllFilesInSubfolders($fullfilename);
                            foreach ($subfiles as $filename) {
                                $AllFiles[] = $filename;
                            }
                            break;
                    }
                } else {
                    // ignore?
                }
            }
            closedir($dirhandle);
        }
        sort($AllFiles);
        return array_unique($AllFiles);
    }


    function SanitizeFilename($filename) {
        $filename = ereg_replace('[^'.preg_quote(' !#$%^()+,-.;<>=@[]_{}').'a-zA-Z0-9]', '_', $filename);
        if (phpthumb_functions::version_compare_replacement(phpversion(), '4.1.0', '>=')) {
            $filename = trim($filename, '.');
        }
        return $filename;
    }

}


////////////// END: class phpthumb_functions //////////////


if (!function_exists('gd_info')) {
    // built into PHP v4.3.0+ (with bundled GD2 library)
    function gd_info() {
        static $gd_info = array();
        if (empty($gd_info)) {
            // based on code by johnschaefer at gmx dot de
            // from PHP help on gd_info()
            $gd_info = array(
                'GD Version'         => '',
                'FreeType Support'   => false,
                'FreeType Linkage'   => '',
                'T1Lib Support'      => false,
                'GIF Read Support'   => false,
                'GIF Create Support' => false,
                'JPG Support'        => false,
                'PNG Support'        => false,
                'WBMP Support'       => false,
                'XBM Support'        => false
            );
            $phpinfo_array = phpthumb_functions::phpinfo_array();
            foreach ($phpinfo_array as $line) {
                $line = trim(strip_tags($line));
                foreach ($gd_info as $key => $value) {
                    //if (strpos($line, $key) !== false) {
                    if (strpos($line, $key) === 0) {
                        $newvalue = trim(str_replace($key, '', $line));
                        $gd_info[$key] = $newvalue;
                    }
                }
            }
            if (empty($gd_info['GD Version'])) {
                // probable cause: "phpinfo() disabled for security reasons"
                if (function_exists('ImageTypes')) {
                    $imagetypes = ImageTypes();
                    if ($imagetypes & IMG_PNG) {
                        $gd_info['PNG Support'] = true;
                    }
                    if ($imagetypes & IMG_GIF) {
                        $gd_info['GIF Create Support'] = true;
                    }
                    if ($imagetypes & IMG_JPG) {
                        $gd_info['JPG Support'] = true;
                    }
                    if ($imagetypes & IMG_WBMP) {
                        $gd_info['WBMP Support'] = true;
                    }
                }
                // to determine capability of GIF creation, try to use ImageCreateFromGIF on a 1px GIF
                if (function_exists('ImageCreateFromGIF')) {
                    if ($tempfilename = phpthumb::phpThumb_tempnam()) {
                        if ($fp_tempfile = @fopen($tempfilename, 'wb')) {
                            fwrite($fp_tempfile, base64_decode('R0lGODlhAQABAIAAAH//AP///ywAAAAAAQABAAACAUQAOw==')); // very simple 1px GIF file base64-encoded as string
                            fclose($fp_tempfile);

                            // if we can convert the GIF file to a GD image then GIF create support must be enabled, otherwise it's not
                            $gd_info['GIF Read Support'] = (bool) @ImageCreateFromGIF($tempfilename);
                        }
                        unlink($tempfilename);
                    }
                }
                if (function_exists('ImageCreateTrueColor') && @ImageCreateTrueColor(1, 1)) {
                    $gd_info['GD Version'] = '2.0.1 or higher (assumed)';
                } elseif (function_exists('ImageCreate') && @ImageCreate(1, 1)) {
                    $gd_info['GD Version'] = '1.6.0 or higher (assumed)';
                }
            }
        }
        return $gd_info;
    }
}


if (!function_exists('is_executable')) {
    // in PHP v3+, but v5.0+ for Windows
    function is_executable($filename) {
        // poor substitute, but better than nothing
        return file_exists($filename);
    }
}


if (!function_exists('preg_quote')) {
    // included in PHP v3.0.9+, but may be unavailable if not compiled in
    function preg_quote($string, $delimiter='\\') {
        static $preg_quote_array = array();
        if (empty($preg_quote_array)) {
            $escapeables = '.\\+*?[^]$(){}=!<>|:';
            for ($i = 0; $i < strlen($escapeables); $i++) {
                $strtr_preg_quote[$escapeables{$i}] = $delimiter.$escapeables{$i};
            }
        }
        return strtr($string, $strtr_preg_quote);
    }
}

if (!function_exists('file_get_contents')) {
    // included in PHP v4.3.0+
    function file_get_contents($filename) {
        if (eregi('^(f|ht)tp\://', $filename)) {
            return SafeURLread($filename, $error);
        }
        if ($fp = @fopen($filename, 'rb')) {
            $rawData = '';
            do {
                $buffer = fread($fp, 8192);
                $rawData .= $buffer;
            } while (strlen($buffer) > 0);
            fclose($fp);
            return $rawData;
        }
        return false;
    }
}


if (!function_exists('file_put_contents')) {
    // included in PHP v5.0.0+
    function file_put_contents($filename, $filedata) {
        if ($fp = @fopen($filename, 'wb')) {
            fwrite($fp, $filedata);
            fclose($fp);
            return true;
        }
        return false;
    }
}

if (!function_exists('imagealphablending')) {
    // built-in function requires PHP v4.0.6+ *and* GD v2.0.1+
    function imagealphablending(&$img, $blendmode=true) {
        // do nothing, this function is declared here just to
        // prevent runtime errors if GD2 is not available
        return true;
    }
}

if (!function_exists('imagesavealpha')) {
    // built-in function requires PHP v4.3.2+ *and* GD v2.0.1+
    function imagesavealpha(&$img, $blendmode=true) {
        // do nothing, this function is declared here just to
        // prevent runtime errors if GD2 is not available
        return true;
    }
}

?>